System and method for purifying and recycling amine liquid of smoke CO2 trapping system for coal-fired power plant

Abstract

The invention discloses a system and method for purifying and recycling amine liquid of a smoke CO2 trapping system for a coal-fired power plant. The system comprises an activated carbon filter and a security filter, which are communicated and used for removing solid particles and corrosion products, and a plurality of ion exchangers which are communicated with the security filter and used for removing thermal stable salts. The method comprises the following steps: with activated carbon and macroporous adsorption-strong base mixed anion exchange resin in combination, removing thermal stable salts by adopting strong base mixed anion exchange resin, and removing chromaticity color and a corrosion product ferric salt by adopting fine filtration of activated carbon and macroporous resin. Thus, the thermal stable salts can be efficiently removed, and meanwhile, the chromaticity color of a degenerative organic amine solution and corrosion products such as the ferric salt are removed; the efficiency of absorbing carbon dioxide by alcohol amine in the smoke trapping system for the coal-fired power plant is improved, and corrosion to equipment of the trapping system caused by the degenerative amine solution is relieved; meanwhile, energy consumption of the system is reduced, and the damage to the environment caused by emission of high-pollution solutions is avoided.

Description

technical field [0001] The invention belongs to the flue gas CO of coal-fired power station 2 Capture system technical field, specifically related to a coal-fired power plant flue gas CO 2 A system and method for purifying and recycling amine liquid in a trapping system. Background technique [0002] CO 2 The emission reduction has become a research and development hotspot in the international energy field. As the issue of global climate change has increasingly become a hot spot of global concern, the pace of global cooperation to jointly address climate change has gradually accelerated. With the rapid economic growth in recent years, my country's CO 2 Emissions maintain a rapid growth trend, which has attracted more and more attention and pressure from the international community. [0003] Carbon dioxide produced by coal combustion accounts for more than 3 / 4 of my country's total carbon dioxide emissions. According to statistics from relevant departments, coal-fired po...

AI Technical Summary

Problems solved by technology

The alcohol amine solution under high temperature conditions adopted by this method is prone to oxidation and degradation; at the same time, a large amount of steam is required, the energy consumption is high, and the operation is complicated

In addition, the organic amine liquid is in a high-salt state in the recovery heater, which is highly corrosive to the equipment

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